validation/sm_casts.c

   1 void frob(void);
   2
   3 char c;
   4 static int options_write(void)
   5 {
   6         char a;
   7         unsigned char b;
   8
   9         a = (char)0xff;
  10         a = 0xff;
  11         (char)b = 0xff;
  12         b = 0xff;
  13         if (c > -400)
  14                 frob();
  15         if (c < -400)
  16                 frob();
  17         if (400 > c)
  18                 frob();
  19         if (-400 > c)
  20                 frob();
  21         b = -12;
  22
  23 }
  24 /*
  25  * check-name: smatch cast handling
  26  * check-command: smatch sm_casts.c
  27  *
  28  * check-output-start
  29 sm_casts.c:13 options_write() warn: always true condition '(c > -400) => ((-128)-127 > (-400))'
  30 sm_casts.c:15 options_write() warn: impossible condition '(c < -400) => ((-128)-127 < (-400))'
  31 sm_casts.c:17 options_write() warn: always true condition '(400 > c) => (400 > (-128)-127)'
  32 sm_casts.c:19 options_write() warn: impossible condition '(-400 > c) => ((-400) > (-128)-127)'
  33 sm_casts.c:21 options_write() warn: assigning (-12) to unsigned variable 'b'
  34  * check-output-end
  35  */